Rotor for torque sensor

Abstract

Disclosed is a rotor for a torque sensor configured to improve a mechanical coupling force with respect to a jig in a process of adjusting a torque center, thus enabling a fine adjustment, the rotor including a rotor body having a sleeve coupled to a rotating shaft and a yoke protruding from an outer circumference of the sleeve, a ring-shaped magnet coupled to an outer circumference of the yoke, and an anti-slip structure formed on the rotor body and partially coming into contact with a jig during a rotating process for adjusting a torque center, thus inhibiting slipping between the rotor body and the jig when a rotating force is transmitted, so that slipping between the jig and the rotor body is inhibited to enable precise transmission of the rotating force whereby accuracy is improved during fine adjustment of the torque center.

What is claimed is: 
     
       1. A rotor for a torque sensor comprising:
 a rotor body comprising a sleeve having a first outer circumference and a yoke having a second outer circumference; 
 a magnet provided around the second outer circumference of the yoke; 
 a serrated portion having a plurality of serrations being arranged in a circumferential direction of the rotor body, wherein each of the plurality of serrations extend in a radial direction of the rotor body. 
 
     
     
       2. The rotor of  claim 1 , wherein a width of the serrated portion is smaller than a width of the magnet, and the widths of the serrated portion and the magnet are lengths in an axial direction of the rotor body. 
     
     
       3. The rotor of  claim 1 , wherein a protruding direction of the plurality of serrations is parallel to an axial direction of the rotor body. 
     
     
       4. The rotor of  claim 3 , wherein the serrated portion is disposed at a higher position than the magnet in the protruding direction of the plurality of serrations. 
     
     
       5. The rotor of  claim 1 , wherein the sleeve, yoke, magnet and serrated portion have a circular shape. 
     
     
       6. The rotor of  claim 5 , wherein a center of the sleeve, yoke, magnet and serrated portion are aligned in a direction of a shaft provided through an inner circumference of the sleeve and the yoke. 
     
     
       7. The rotor of  claim 1 , wherein the second outer circumference of the yoke is greater than the first circumference of the sleeve, wherein the difference in the first outer circumference of the sleeve and the second outer circumference of the yoke results in a ledge being provided on the yoke, and the serrated portion is provided on the ledge. 
     
     
       8. The rotor of  claim 1 , wherein the serrated portion has first and second surfaces, the plurality of serrations are provided on the first surface and the second surface is in contact with the yoke. 
     
     
       9. The rotor of  claim 1 , wherein the yoke is integrated with the sleeve. 
     
     
       10. The rotor of  claim 1 , wherein the magnet comprises a plurality of segmented arc-shaped magnets. 
     
     
       11. The rotor of  claim 1 , wherein at least one hole is provided on a side surface of the sleeve. 
     
     
       12. The rotor of  claim 1 , wherein the serrated portion is configured for coupling to a jig. 
     
     
       13. A torque sensor comprising:
 a stator coupled to a first shaft; and 
 a rotor coupled to a second shaft and disposed in the stator, 
 wherein the rotor comprises, 
 a rotor body comprising a sleeve having a first outer circumference and a yoke having a second outer circumference; 
 a magnet provided around the second outer circumference of the yoke; 
 a serrated portion having a plurality of serrations being arranged in a circumferential direction of the rotor body, wherein each of the plurality of serrations extend in a radial direction of the rotor body. 
 
     
     
       14. The torque sensor of  claim 13 , wherein a width of the serrated portion is smaller than a width of the magnet, and the widths of the serrated portion and the magnet are lengths in an axial direction of the rotor body. 
     
     
       15. The torque sensor of  claim 13 , wherein a protruding direction of the plurality of serrations is parallel to an axial direction of the rotor body. 
     
     
       16. The torque sensor of  claim 15 , wherein the serrated portion is disposed at a higher position than the magnet in the protruding direction of the plurality of serrations. 
     
     
       17. The torque sensor of  claim 13 , wherein the serrated portion has first and second surfaces, the plurality of serrations is provided on the first surface and the second surface is in contact with the yoke. 
     
     
       18. The torque sensor of  claim 13 , wherein the second outer circumference of the yoke is greater than the first circumference of the sleeve, wherein the difference in the first outer circumference of the sleeve and the second outer circumference of the yoke results in a ledge being provided on the yoke, and the serrated portion is provided on the ledge. 
     
     
       19. The torque sensor of  claim 13 , wherein at least one hole is provided on a side surface of the sleeve. 
     
     
       20. The torque sensor of  claim 13 , wherein the serrated portion is configured for coupling to a jig.